Grinding-tool



P. u. LOVELACE' GRINDING TOOL. v

APPLICATION FILED FEB. 9, 1920.

1493461036 V. Ptntdguly 6,

l By

ATTORNEYS WTNESSES UNITED STATES PAUL UCLAIR LOVELACE, 0F CLINTON, OKLAHOMA.

GRINDING-TOOL.

Specification of Letters Patent.

Patented July 6, 1920.

Application led February 9, 1920. Serial No. 357,252.

T 0 all whom t may concern Be it known that I, PAUL U. LovnLAon, a citizen of the United States, and a resident of the city of Clinton, in the county of Custer and State of Oklahoma, have invented a new and Improved Grinding-Tool, of which the following is a full, clear, and exact description.

This invention relates to improvements in grinding tools, and more particularly to tools for grinding shafts, an object of the invention being to provide a tool which can be manually operated to re-grind or true up crank pins or journals on automobiles, engines and the like, after they become liat and out of round from eXessive Wear.

A further object is to provide a tool of the character stated, which can be manufactured and sold at a reasonably low price, and which can be conveniently used without the necessity of employing skilled labor.

YWith these and other objects in view, the

invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

ln the accompanying drawings:

Figure l is a view in side elevation illustrating my improvement.

Fig. 2 is a view in section on the line 2--2 of Fig. l.

Fig. 3 is an end view.

My improved tool, comprises two members l and 2, both preferably of metal and member l made with a handle 3 forminga lever to operate the tool.

The members l and 2 constitute in effect a split bearing having semi-circular reverses i therein, receiving curved grinding stones 5 therein which are secured in place when the members l and 2 are clamped together.

Member l is provided with a pair of screw-threaded studs G projected through openings 7 in member 2, and clamping nuts 3 are secured onto the ends of the studs.

A metal clip 9 is secured to the member 2 and is made with tongues l0 at its ends engaging the sides of one of the stones .5 and angular clips ll are secured to the sides of member l and engage the sides of the other stone 5. These clips 9 and ll serve to hold the stones against lateral displacement and l preferably employ screws 12 to secure the clips `to the members so as to permit the convenient removal of the clips.

Shims or spacing-washers 13 are provided between the members l and 2 and one or more of these shims project between the pair of stones 5 to prevent rotary movement of the stones in the members l and 2 supporting them.

The stones 5 are curved in shape, so that when they are together they provide a bore 14: with a grinding surface conforming to the shape of the shaft crank pin, or other device on which they are designed to opcrate.

ln operation the tool is positioned on the shaft and the nuts 8 tightened to cause the stones 5 to tightly engage the shaft. The handle 3 is then moved to oscillate or impart a rotary motion to the tool to grind the shaft into its true shape.

It is apparent that stones 5 having a different bore can be substituted for others to conform to the size and shape of the shaft to be ground and hence the same tool can be used for different sizes and shapes of shafts.

Various slight changes might be made in the general form of the parts described without departing from my invention, and hence l do not limit myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. A grinding tool, comprising two members, a handle on one member, said members having semicircular recesses therein, grinding stones in the recesses, shims between the grinding stones preventing rotary movement thereof in the members, and means secured on the members for preventing lateral movement of the stones. Y

A grinding tool, comprising two members, an integral handle on one member, said members having semicircular recesses therein, grinding stones in the recesses, fixed studs on one member' projecting through the other member, nuts on the studs removably securing said members together, shims around said studs and extending between said grinding stones preventing rotary movement thereof in the members, angular clips secured on opposite sides of the handle member preventing lateral movement of one stone, a clip secured to the other member, and tongues on the last-mentioned clip engaging opposite sides of the other stone and preventing lateral movement thereof.

PAUL UCLAIR LOVELACE. 

